In Australia, the platypus is officially classified as ‘Common but Vulnerable.’ As a species, it is not currently considered to be endangered. However, platypus populations are believed to have declined or disappeared in many catchments 1, particularly in urban and agricultural landscapes. In most cases, the specific underlying reasons for the reduction in numbers remain unknown. Platypus surveys have only been carried out in a few catchments in eastern Australia. It is, therefore, impossible to provide an accurate estimate of the total number of platypus remaining in the wild. Based on recent studies, the average platypus population density along relatively good quality streams in the foothills of Victoria’s Great Dividing Range is only around one to two animals per kilometer of the channel. Because platypus is predators near the top of the food chain and requires large amounts of food to survive (up to about 30% of a given animal’s body weight each day), it is believed that their numbers are most often limited by the availability of food, mainly in the form of bottom-dwelling aquatic invertebrates such as shrimps, worms, yabbies, pea-shell mussels, and immature and adult aquatic insects. Small frogs and fish eggs are also eaten occasionally, along with some terrestrial insects that fall into the water from overhanging vegetation. Catchments are an area of land drained by a creek or river system or a place set aside for collecting water that runs off the land’s surface.
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Although Platypus is not endangered, it is considered as 1 .
The Platypus population in the
2
and
2
environment has disappeared in most of the catchments.
According to the recent survey, the number of platypi that can be found in the foothills of Victoria’s great dividing range, is just
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or
3
.
Platypus mostly eats food in the form of bottom-dwelling
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.
The platypus needs to eat about 30% of the animal’s body weight each day to
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.
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A total of 300 workers and 15,000 iron pieces were required to complete the construction of the
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.
There are three different levels in the Eiffel Tower, which are all the
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.
The topmost platform is
8
above the ground.
A gallery, restaurant, and souvenir kiosk are located on the
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.
The summit features a history of the Eiffel Tower along with a
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of Gustave Eiffel.
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Roller coasters originated from 11 .
The french men modified the melted ice into
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.
The predecessor to the roller coaster was the
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.
The snow riders used
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or blocks of ice and slid down the ice-covered hills, crash-landing into a sand-pile.
It was the
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who expanded the idea of roller coasters with more complex track layouts.